Back pressure valve taking, conveying and installing tool convenient to split

Abstract

The invention relates to the technical field of back pressure valve equipment, in particular to a back pressure valve taking, conveying and installing tool convenient to split, which comprises a valve body sleeve, a connecting column, a fixing plate, a hydraulic rod and a supporting table. The top end of the connecting column is connected with a fixing plate, the fixing plate is connected with the bottom output end of a hydraulic rod, and the top of the hydraulic rod is fixed to the bottom of the supporting table. A first extension mechanism is arranged between the supporting table and the lengthening rod, a second extension mechanism is arranged at the top of the lengthening rod, the supporting table and the lengthening rod are of the same structure and each comprise a movable round block, a clamping column, a U-shaped hole and a clamping groove, and the driving assembly is connected with the round blocks. The device is suitable for deep and shallow well operation, the range is flexibly adjusted, and the efficiency is improved. An anti-twisting protective armor composed of an arc-shaped block and a soft cushion is additionally arranged at the position of a transmission rod, the transmission rod is wrapped, rotating force is dispersed, breakage is prevented, and it is guaranteed that the back pressure valve is safely and reliably disassembled and assembled in the high-pressure environment.

Description

Technical Field

[0001] This invention relates to the field of back pressure valve equipment technology, specifically to a convenient tool for picking up, delivering, and installing a split-type back pressure valve. Background Technology

[0002] A back pressure valve is a key device that creates controllable pressure in a fluid system, its core function being to maintain or regulate the back pressure value downstream of the pipeline. This valve typically consists of a valve body, valve core, pressure regulating spring, and sealing components. Its working principle is based on the dynamic balance between fluid pressure and spring preload—when the fluid pressure exceeds the spring's set value, the valve core opens to release the medium; when the pressure decreases, the valve core closes, thereby stabilizing the system pressure. Due to its excellent pressure regulation capability, back pressure valves are widely used in flow control scenarios for various media such as air, water vapor, corrosive media, oil, and even liquid metals and radioactive fluids, making them an indispensable safety control component in industrial pipelines and downhole operations.

[0003] In existing technologies, under pressurized wellhead conditions, back pressure valves are typically fixed to the pipeline interface via a bottom thread. For this type of connection, specialized disassembly and assembly tools have been proposed, such as the hydraulic back pressure valve retrieval tool disclosed in patent number CN214886944U. This tool utilizes a hydraulic system to drive the axial movement of a piston rod, enabling the safe retrieval and delivery of the wellhead back pressure valve under pressurized conditions. Its design principle is clear, its operation is stable and reliable, and the valve's stress state can be precisely controlled by adjusting the hydraulic pump pressure. It is suitable for drill pipe completion and downhole emergency operations, providing an effective solution for valve maintenance in high-pressure fluid environments.

[0004] However, the existing tools mentioned above still have significant shortcomings in practical applications: due to their non-disassembleable overall structure, the tool length cannot be flexibly adjusted to adapt to changes in the working space when facing wellhead operation requirements at different depths. This limitation restricts the tool's operating range in deep well scenarios, while in shallow well environments, structural redundancy reduces efficiency, significantly affecting the installation and disassembly efficiency of the back pressure valve. To address these issues, this invention proposes a conveniently detachable back pressure valve retrieval and installation tool. Summary of the Invention

[0005] The purpose of this invention is to provide a convenient tool for picking up and installing split back pressure valves, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a convenient split-type back pressure valve delivery and installation tool, comprising: a valve body sleeve, the upper surface of the valve body sleeve being fixedly connected to the bottom end of the connecting column, the top end of the connecting column being fixedly connected to the lower surface of the fixing plate, the upper surface of the fixing plate being fixedly connected to the bottom output end of the hydraulic rod, the top non-output end of the hydraulic rod being fixedly sleeved on the bottom of the support platform, and a reinforcing component for reinforcing the connecting column being provided between the valve body sleeve and the fixing plate; The upper surface of the support platform is provided with a first extension mechanism for quick assembly and disassembly with the bottom of the extension rod. The top of the extension rod is provided with a second extension mechanism for quick assembly and disassembly with other extension rods. The first and second extension mechanisms have the same structure. Each extension mechanism includes a set of relatively movable circular blocks. Several locking pins are fixedly connected to the opposite sides of the two circular blocks. A U-shaped hole is opened at the bottom of the extension rod, and locking grooves are opened on both sides of the inner wall of the U-shaped hole. The locking grooves and locking pins are slidably inserted into each other. A drive assembly for driving the relative movement of the circular blocks is connected along the axial direction of the two circular blocks. Preferably, the upper surface of the valve body sleeve and the lower surface of the fixing plate are provided with limit grooves. The reinforcing component includes a set of arc-shaped blocks. Steel columns are fixedly connected to the upper and lower sides of the outer ring surface of the arc-shaped blocks. The steel columns are slidably inserted into the limit grooves. The two arc-shaped blocks are fixedly connected by large bolts.

[0007] Preferably, the inner ring surface of the arc-shaped block is fixedly connected to one end of the reinforcing rod, the other end of the reinforcing rod is fixedly connected to one side of the soft pad, and the other side of the soft pad is tightly abutted against the outer ring surface of the connecting column.

[0008] Preferably, the four corners of the upper surface of the fixed plate are fixedly connected to the bottom of the guide rod, and the top of the guide rod passes through the guide holes opened at the four corners of the support platform, with the guide holes and the guide rod being slidably connected.

[0009] Preferably, a positioning post is fixedly connected to the middle of the top of the support platform and the extension rod, and positioning grooves are opened at the four corners of the lower surface of the extension rod. The positioning grooves are slidably inserted with the positioning posts, and support seats are fixedly connected to both sides of the top of the support platform and the extension rod.

[0010] Preferably, the drive assembly includes a small handwheel, which is fixedly sleeved on one end of the worm gear. Both sides of the worm gear are rotatably sleeved on one end of the limiting plate, and the other end of the limiting plate is fixedly connected to the upper surface of one of the support seats.

[0011] Preferably, a worm wheel is engaged on the lower side of the worm, the worm wheel is fixedly sleeved on the outer ring surface of the large limit plate, the large limit plate is fixedly connected to one end of the rotating cylinder, and the other end of the rotating cylinder is fixedly connected to the small limit plate.

[0012] Preferably, the rotating cylinder is rotatably sleeved on both sides inside the support base, the rotating cylinder is sleeved inside the fixed cylinder and rotatably connected to the fixed cylinder, the outer ring surface of the rotating cylinder is provided with an arc-shaped hole, and the outer ring surface of the fixed cylinder is provided with a straight hole.

[0013] Preferably, the two ends of the fixing cylinder are sleeved inside the support base and are fixedly connected to the support base by small bolts.

[0014] Preferably, the arc-shaped hole and the straight hole are fixedly connected to one end of the sliding column, the other end of the sliding column is fixedly connected to the inner ring surface of the connecting ring, and the outer ring surface of the connecting ring is fixedly connected to the inner ring surface of the circular block.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention's tool can be easily disassembled into different lengths, solving the problem that existing tools cannot adapt to deep or shallow wells. During use, simply turning the small handwheel allows for quick connection or disconnection of the extension rod, making operation simple and labor-saving. Adding the rod extension tool during deep well operations and shortening the tool length for shallow wells allows for flexible handling of different well depths, improving work efficiency.

[0016] 2. The tool of this invention features a reinforced protective layer at the valve's turning point. An arc-shaped block and soft pad tightly wrap around the transmission rod, acting like an "anti-torsion armor" to distribute rotational force and prevent tool breakage. Even under high-pressure environments with repeated valve disassembly and assembly, it remains stable and reliable, significantly improving the safety of back pressure valve installation and disassembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a top view of the overall structure of the present invention; Figure 4 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a three-dimensional schematic diagram of the connecting pipe structure of the present invention; Figure 6 This is a bottom view of the internal structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the rotating cylinder structure of the present invention.

[0018] In the diagram: 1. Valve body sleeve; 2. Connecting column; 3. Fixing plate; 4. Hydraulic rod; 5. Support platform; 6. Extension rod; 7. Round block; 8. Locking column; 9. U-shaped hole; 10. Locking groove; 11. Limiting groove; 12. Arc-shaped block; 13. Steel column; 14. Reinforcing rod; 15. Soft pad; 16. Guide rod; 17. Guide hole; 18. Positioning column; 19. Positioning groove; 20. Support seat; 21. Small handwheel; 22. Worm gear; 23. Limiting plate; 24. Worm wheel; 25. Large limit plate; 26. Rotating cylinder; 27. Small limit plate; 28. Arc-shaped hole; 29. ​​Straight hole; 30. Fixing cylinder; 31. Connecting ring; 32. Sliding column. Detailed Implementation To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 8This invention provides a technical solution: a convenient tool for picking up and installing a split back pressure valve, comprising: a valve body sleeve 1 with an internal hollow polygonal cavity, the size of which is adapted to the polygonal prism structure on the top of the back pressure valve, thereby facilitating the snap-fit ​​between the valve body sleeve 1 and the top of the back pressure valve; the upper surface of the valve body sleeve 1 is fixedly connected to the bottom end of a connecting column 2, and the top end of the connecting column 2 is fixedly connected to the lower surface of a fixing plate 3, thus making the valve body sleeve 1, connecting column 2, and fixing plate 3 a whole; the upper surface of the fixing plate 3 is fixedly connected to the bottom output end of a hydraulic rod 4; the top non-output end of the hydraulic rod 4 is fixedly sleeved on the bottom of a support platform 5, which fixes the hydraulic rod 4; the hydraulic rod 4 is electrically connected to an external control device, thereby facilitating the control of the extension and retraction of the hydraulic rod 4, and thus facilitating the movement of the valve body sleeve 1; a reinforcing component for reinforcing the connecting column 2 is provided between the valve body sleeve 1 and the fixing plate 3, which reinforces the connecting column 2 as a whole, thereby preventing the connecting column 2 from being twisted off during the tightening process; the upper surface of the support platform 5 is provided with a tool for connecting to an extension rod 6. The first extension mechanism is quick to detach from the bottom, and the top of the extension rod 6 is provided with a second extension mechanism for quick detachment from other extension rods 6. The first extension mechanism and the second extension mechanism have the same structure. The first extension mechanism and the second extension mechanism facilitate the splicing between the support platform 5 and the extension rod 6, and also facilitate the splicing between extension rods 6, thereby facilitating the adaptation to the wellhead operation requirements at different depths. The extension mechanism includes a set of relatively movable circular blocks 7. Several locking posts 8 are fixedly connected to the opposite side of the two circular blocks 7. The bottom of the extension rod 6 is provided with a U-shaped hole 9, and the inner walls of the U-shaped hole 9 are provided with locking grooves 10. The locking grooves 10 and the locking posts 8 are slidably inserted. Both the locking posts 8 and the locking grooves 10 are polygonal structures, thereby improving the transmission stability between them. The two circular blocks 7 are connected to a drive component for driving the relative movement of the circular blocks 7 in the axial direction. The support platform 5 and the extension rod 6 are provided with through holes, thereby facilitating the locking of the external drive mechanism and the rotation of the entire device.

[0020] In use, when installing the back pressure valve inside the wellhead, the output end of the hydraulic rod 4 is extended, indirectly driving the valve body sleeve 1 towards the top of the back pressure valve inside the wellhead until the valve body sleeve 1 is engaged inside the top of the back pressure valve. At this point, an external drive device is connected to it through the through holes on both sides of the support platform 5. While controlling the drive device to rotate, the hydraulic rod 4 is controlled to retract in the opposite direction, thus removing the back pressure valve from the wellhead. When installation is required, the drive device is controlled to rotate the entire assembly, while the hydraulic rod 4 is also controlled to extend, thereby completing the threaded connection between the back pressure valve and the pipeline. When the wellhead depth... At deeper depths, the support platform 5 and the extension rod 6 are spliced ​​together by an extension mechanism. Several extension rods 6 can then be quickly spliced ​​together using the extension mechanism. Specifically, the two circular blocks 7 move in opposite directions by the drive component, which drives the locking pin 8 to move synchronously. The locking pin 8 then inserts into the locking slot 10. When the locking pin 8 is fully inserted into the locking slot 10, the support platform 5 and the extension rod 6 are fixedly connected, and the extension rods 6 are also fixedly connected to each other. This extends the entire device to adapt to operations at different wellhead depths. When disassembly is required, the reverse control drive component can quickly disassemble the device, thus enabling convenient disassembly.

[0021] Limiting grooves 11 are provided on the upper surface of the valve body sleeve 1 and the lower surface of the fixing plate 3. The reinforcing component includes a set of arc-shaped blocks 12. Steel columns 13 are fixedly connected to the upper and lower sides of the outer ring surface of the arc-shaped blocks 12. The steel columns 13 are slidably inserted into the limiting grooves 11, and the limiting grooves 11 limit the steel columns 13. The two arc-shaped blocks 12 are fixedly connected by large bolts, which facilitates the installation or disassembly of the two arc-shaped blocks 12. The inner ring surface of the arc-shaped blocks 12 is fixedly connected to one end of the reinforcing rod 14, and the other end of the reinforcing rod 14 is fixedly connected to one side of the soft pad 15. The other side of the soft pad 15 is tightly abutted against the outer ring surface of the connecting column 2.

[0022] To prevent the connecting column 2 from breaking during the tightening process, two arc-shaped blocks 12 are slidably connected to the steel column 13 through the limiting groove 11, thereby aligning the two arc-shaped blocks 12. The steel column 13 is then engaged in the limiting groove 11. At this time, the two arc-shaped blocks 12 are tightened by large bolts, so that the reinforcing rod 14, which is fixedly connected to the inner ring surface of the arc-shaped blocks 12, drives the soft pad 15 to press against the outer ring surface of the connecting column 2, thereby reinforcing the connecting column 2. During the tightening process, since the steel column 13 is engaged in the limiting groove 11, the valve body sleeve 1 can be indirectly driven by the arc-shaped blocks 12 for auxiliary tightening.

[0023] The four corners of the upper surface of the fixed plate 3 are fixedly connected to the bottom of the guide rod 16. The top of the guide rod 16 passes through the guide holes 17 opened at the four corners of the support platform 5. The guide holes 17 guide and limit the guide rod 16. The guide holes 17 and the guide rod 16 are slidably connected. The support platform 5 and the extension rod 6 are both fixedly connected to the middle of the top. The extension rod 6 is provided with positioning grooves 19 at the four corners of the lower surface. The positioning grooves 19 are slidably inserted into the positioning posts 18. The support platform 5 and the extension rod 6 are both fixedly connected to the top two sides. Through the sliding insertion of the positioning posts 18 and the positioning grooves 19, it is easy to quickly connect the support platform 5 and the extension rod 6 and the extension rod 6 with each other, thus facilitating rapid splicing.

[0024] The drive assembly includes a small handwheel 21, which is fixedly sleeved on one end of a worm gear 22. Twisting the handwheel 21 drives the worm gear 22 to rotate. Both sides of the worm gear 22 are rotatably sleeved on one end of a limiting plate 23, which provides limiting support for the worm gear 22. The other end of the limiting plate 23 is fixedly connected to the upper surface of one of the support seats 20. A worm wheel 24 meshes with the lower side of the worm gear 22, and the worm wheel 24 engages with the worm gear 22 for transmission. The worm wheel 24 is fixedly sleeved on the outer ring surface of a large limiting plate 25. The large limiting plate 25 is fixedly connected to one end of a rotating cylinder 26, and the other end of the rotating cylinder 26 is fixedly connected to a small limiting plate 27. The large limiting plate 25 and the small limiting plate 27... Positioning plate 27 limits the end of rotating cylinder 26. Rotating cylinder 26 is rotatably sleeved in support base 20 on both sides. Rotating cylinder 26 is sleeved in fixed cylinder 30 and rotatably connected to fixed cylinder 30. An arc-shaped hole 28 is opened on the outer ring surface of rotating cylinder 26. A straight hole 29 is opened on the outer ring surface of fixed cylinder 30. Both ends of fixed cylinder 30 are sleeved in support base 20 and fixedly connected to support base 20 by small bolts. Fixed cylinder 30 is fixed by support base 20. Arc-shaped hole 28 and straight hole 29 are fixedly connected to one end of sliding column 32. The other end of sliding column 32 is fixedly connected to the inner ring surface of connecting ring 31. The outer ring surface of connecting ring 31 is fixedly connected to the inner ring surface of round block 7.

[0025] When the support platform 5 and the extension rod 6 are to be spliced ​​together, the extension rod 6 is first initially limited by the insertion of the positioning post 18 and the positioning groove 19. Then, by turning the small handwheel 21, the small handwheel 21 drives the worm gear 22 to rotate. The worm gear 22 then drives the large limit plate 25 fixed inside it to rotate. The large limit plate 25 then drives the rotating cylinder 26 to rotate synchronously. The rotating cylinder 26 rotates inside the fixed cylinder 30. Through the arc-shaped hole 28 on the outer surface of the rotating cylinder 26 and the straight hole 29 on the outer surface of the fixed cylinder 30, it can be driven... The sliding column 32 slides laterally, which in turn drives the connecting ring 31 to move. The connecting ring 31 then drives the circular block 7 to move synchronously, causing the two circular blocks 7 to move in opposite directions. The circular block 7 drives the locking column 8 to insert into the locking groove 10 until it is fully inserted into the locking groove 10, thus fixing the extension rod 6 and the support platform 5. The extension rod 6 is also fixed in a limited position, thereby extending the entire device. When it needs to be disassembled, simply turn the small handwheel 21 in the opposite direction to adapt to wellheads of different depths, improving the efficiency of installation and disassembly of the back pressure valve and also enhancing convenience.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient tool for picking up, delivering, and installing a split-type back pressure valve, comprising a valve body sleeve (1), characterized in that: The upper surface of the valve body sleeve (1) is fixedly connected to the bottom end of the connecting column (2), the top end of the connecting column (2) is fixedly connected to the lower surface of the fixing plate (3), the upper surface of the fixing plate (3) is fixedly connected to the bottom output end of the hydraulic rod (4), the top non-output end of the hydraulic rod (4) is fixedly sleeved on the bottom of the support platform (5), and a reinforcing component for reinforcing the connecting column (2) is provided between the valve body sleeve (1) and the fixing plate (3); The upper surface of the support platform (5) is provided with a first extension mechanism that facilitates quick assembly and disassembly with the bottom of the extension rod (6). The top of the extension rod (6) is provided with a second extension mechanism that facilitates quick assembly and disassembly with other extension rods (6). The first extension mechanism and the second extension mechanism have the same structure. The extension mechanism includes a set of relatively movable circular blocks (7). Several locking pins (8) are fixedly connected to the opposite side of the two circular blocks (7). A U-shaped hole (9) is opened at the bottom of the extension rod (6). A slot (10) is opened on both sides of the inner wall of the U-shaped hole (9). The slot (10) and the locking pin (8) are slidably inserted. A drive component for driving the circular blocks (7) to move relative to each other is connected in the axial direction of the two circular blocks (7).

2. The convenient split-type back pressure valve delivery and installation tool according to claim 1, characterized in that: The upper surface of the valve body sleeve (1) and the lower surface of the fixing plate (3) are provided with limit grooves (11). The reinforcement component includes a set of arc blocks (12). Steel columns (13) are fixedly connected to the upper and lower sides of the outer ring surface of the arc blocks (12). The steel columns (13) are slidably inserted into the limit grooves (11). The two arc blocks (12) are fixedly connected by large bolts.

3. The convenient split-type back pressure valve delivery and installation tool according to claim 2, characterized in that: The inner ring surface of the arc block (12) is fixedly connected to one end of the reinforcing rod (14), the other end of the reinforcing rod (14) is fixedly connected to one side of the soft pad (15), and the other side of the soft pad (15) is tightly abutted against the outer ring surface of the connecting column (2).

4. The convenient split-type back pressure valve delivery and installation tool according to claim 1, characterized in that: The four corners of the upper surface of the fixed plate (3) are fixedly connected to the bottom end of the guide rod (16), and the top end of the guide rod (16) passes through the guide holes (17) opened at the four corners of the support platform (5). The guide holes (17) and the guide rod (16) are slidably connected.

5. The convenient split-type back pressure valve delivery and installation tool according to claim 4, characterized in that: The support platform (5) and the extension rod (6) are both fixedly connected to the middle of the top of the support platform (5) and the extension rod (6). The four corners of the lower surface of the extension rod (6) are provided with positioning grooves (19). The positioning grooves (19) and the positioning columns (18) are slidably inserted. The support bases (20) are fixedly connected to both sides of the top of the support platform (5) and the extension rod (6).

6. The convenient split-type back pressure valve delivery and installation tool according to claim 5, characterized in that: The drive assembly includes a small handwheel (21), which is fixedly sleeved on one end of the worm (22). Both sides of the worm (22) are rotatably sleeved on one end of the limiting plate (23), and the other end of the limiting plate (23) is fixedly connected to the upper surface of one of the support seats (20).

7. The convenient split-type back pressure valve delivery and installation tool according to claim 6, characterized in that: The worm (22) is meshed with a worm wheel (24) on its lower side. The worm wheel (24) is fixedly sleeved on the outer ring surface of the large limit plate (25). The large limit plate (25) is fixedly connected to one end of the rotating cylinder (26), and the other end of the rotating cylinder (26) is fixedly connected to the small limit plate (27).

8. The convenient split-type back pressure valve delivery and installation tool according to claim 7, characterized in that: The rotating cylinder (26) is rotatably sleeved in the support base (20) on both sides. The rotating cylinder (26) is sleeved in the fixed cylinder (30) and rotatably connected to the fixed cylinder (30). The outer ring surface of the rotating cylinder (26) is provided with an arc-shaped hole (28), and the outer ring surface of the fixed cylinder (30) is provided with a straight hole (29).

9. The convenient split-type back pressure valve delivery and installation tool according to claim 8, characterized in that: The fixed cylinder (30) is fitted inside the support base (20) at both ends and is fixedly connected to the support base (20) by small bolts.

10. The convenient split-type back pressure valve delivery and installation tool according to claim 8, characterized in that: The arc-shaped hole (28) and the straight hole (29) are fixedly connected to one end of the sliding column (32), the other end of the sliding column (32) is fixedly connected to the inner ring surface of the connecting ring (31), and the outer ring surface of the connecting ring (31) is fixedly connected to the inner ring surface of the round block (7).

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